rom/graphics/finddisplayinfo.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function FindDisplayInfo()
   6     Lang: english
   7 */
   8 #include <aros/debug.h>
   9 #include <proto/graphics.h>
  10 #include <graphics/displayinfo.h>
  11 #include <hidd/graphics.h>
  12 #include "dispinfo.h"
  13 #include "graphics_intern.h"
  14
  15 /*****************************************************************************
  16
  17     NAME */
  18 #include <proto/graphics.h>
  19
  20         AROS_LH1(DisplayInfoHandle, FindDisplayInfo,
  21
  22 /*  SYNOPSIS */
  23         AROS_LHA(ULONG, ID, D0),
  24
  25 /*  LOCATION */
  26         struct GfxBase *, GfxBase, 121, Graphics)
  27
  28 /*  FUNCTION
  29         Search for a DisplayInfo which matches the ID key.
  30
  31     INPUTS
  32         ID - identifier
  33
  34     RESULT
  35         handle - handle to a displayinfo record with that key
  36                  or NULL if no match
  37
  38     NOTES
  39
  40     EXAMPLE
  41
  42     BUGS
  43
  44     SEE ALSO
  45         graphics/displayinfo.h
  46
  47     INTERNALS
  48
  49     HISTORY
  50
  51
  52 ******************************************************************************/
  53 {
  54     AROS_LIBFUNC_INIT
  55     AROS_LIBBASE_EXT_DECL(struct GfxBase *,GfxBase)
  56
  57     DisplayInfoHandle ret = NULL;
  58     HIDDT_ModeID hiddmode;
  59     OOP_Object *sync, *pixfmt;
  60
  61     D(bug("FindDisplayInfo(id=%x)\n", ID));
  62
  63     /* Check for the NOTNULLMASK */
  64     if ((ID & NOTNULLMASK) != NOTNULLMASK) {
  65         D(bug("!!! NO AROS MODEID IN FindDisplayInfo() !!!\n"));
  66         return NULL;
  67     }
  68
  69     hiddmode = AMIGA_TO_HIDD_MODEID(ID);
  70
  71     /* Try to get mode info for the mode */
  72     if (!HIDD_Gfx_GetMode(SDD(GfxBase)->gfxhidd, hiddmode, &sync, &pixfmt)) {
  73         D(bug("!!! NO AROS MODEID IN FindDisplayInfo() !!!\n"));
  74         return NULL;
  75     }
  76
  77     ret = (DisplayInfoHandle)ID;
  78
  79     return ret;
  80
  81     AROS_LIBFUNC_EXIT
  82 } /* FindDisplayInfo */